Generally, reinforced concrete deck slabs are the most often used type of deck for steel bridges. The file extension pdf and ranks to the documents category. Flat slab analysis, design and detailing pdf civil engineering. Concrete volumes and slab design data 81 concrete slabs on form deck 82 83 ufs, uf1x, ufx, uf2x maximum span and cantilever tables 84 slab and reinforcement data 85 fire resistance ratings 86 sdi long form specifications 87 91 introduction 92 diaphragm design example 93 typical fastener layout 94 1. Nhi course 081 load resistance factor design lrfd for highway bridge superstructures, design examples pdf, 7. Typical layout of load bearing building design data. Design of reinforced concrete, 10th edition by jack mccormac and russell brown, introduces the fundamentals of reinforced concrete design in a clear and comprehensive manner and grounded in the basic principles of mechanics of solids. Find the following parameters for design moments in step 2 per unit width step 4 note.
Pretty easy, we used to have the same stair case in my home in india. How to design a cantilevered, slabless, waistless rcc. Design the slab following the provisions of the aci code. Actually they are very similar except in dimensions. The service live load is 100 psf and 4000 psi concrete is specified for use with steel with a yield stress equal to 60000 psi. Isolated footing design example and excel sheet download. Design of reinforced concrete structures ii twoway slabs. Oneway and twoway slabs university of asia pacific. The slab being thinner than it is wide and the beam being thicker.
Asce, secb course content slab on grades construction. Design of replacenent upper roof introduction as part of the works at south kensington station asset stabilization program there is a requirement for a design of replacement upper roof. Design of cantilever slab spreadsheet download link. Using aashto lrfd bridge design specifications 4th ed. Oct 29, 2015 isolated footing design example and excel sheet there is document isolated footing design example and excel sheet available here for reading and downloading. Examples c1 through c5 are a set of examples that illustrate the elevation of a singlestory home with a crawlspace. Conceptual design and design examples for multistorey buildings.
Examples to eurocode steel design to en 1993 bs en page. Design criteria for concrete slab in composite steel deck floors section 5. Concrete deck slabs can be constructed with castinplace or precast methods, and typically include mild steel reinforcement in the longitudinal and transverse directions. Microsoft powerpoint ce 479 fall 05compositefloor decks. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment. A civil engineer should study these lectures and materials for structural engineering acumen. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Flat slab analysis and design pdf flat slab design pdf 1. Conceptual design and design examples for multistorey. The stem may have constant thickness along the length or may be tapered based on economic and construction criteria. Manual for the design of hollow core slabs second edition by donald r. Load calculations page 1 of 6 load calculations according to asce 7. A typical example of the decking layout for a composite floor is shown in.
Distribution steel in the bottom of slabs shall be designed in accordance with lrfd article 9. Design of reinforced concrete structures ii twoway slabs 1 1. The slab is supported on beams of size 225 x 500 mm spaced at 4. What is the difference and similarity of cantilever slab and. The trial depth is selected based on spandepth ratio of 7, as in is. To achieve this, architects normally extend the slab beyond the ground floor building line, thereby forming a cantilever. Redistribution of force concentrations in reinforced concrete. Refer to document knukdescds1890003 rev 04 for conceptual design statement. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. Western bridge preservation partnership meeting phoenix, arizona may 1214, 2020. Retaining wall design temporary condition the following calculations will consider the worst case. This spread sheets is useful for design of cantilever slab as per is 456.
Bend length at the end of the reinforcement bar beam has to be. Introcduction slab in which the deflected surface is predominantly cylindrical termed as oneway slabs spanning in the direction of curvature. The lateral loads are independently resisted by shear walls. Reinforced concrete cantilever retaining wall analysis and. Reinforced concrete constant width cantilever slab detail.
Use the download button below or simple online reader. Crosssections can include a combination of rectangular, i, t and lsections, and spans can have constant or tapered sections. The execution of the design will be explained with reference to an example. Application of limit state method to rectangular beams for flexure, shear, bond and torsion. The detailed design process is developed in the following chapters, each of which. Essentially the balancing load reduces the design shear in a manner similar to that associated with the design moments. Continuous one way slab figure 1 shows a clear area of 12 m x 8. Simply supported, cantilever slab, overhanging slab, fixed or continues slab. These materials are originally located at different websites. Integrated ifb beams with undertied hollow sections to create a span of 12,5 m, which is 30% larger than is possible with integrated beams.
Watercooled composite slab using sinusoidal stainless steel facade, which acted as framework to the concrete slab of 300 mm depth. Recommendations for design of beamcolumn connections in monolithic. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. Hello in this video cantilever slab is design as per is. A detailed explanation will be given of the checksto be carried out, the aspects to be considered in the design and the construction procedures and sequences of a posttensioned slab. Reinforced concrete design to bs8110 structural design 1 lesson 5 5 4. Run a beam diagonally along a side and then design a step as cantilever and anchor. Design of one way and two way slabs, design of staircases. A brick wall of 250 mm thickness including plaster of 1.
Bending will take place in the two directions in a dishlike fo. Design of cantilever slab civil engineering youtube. Cantilever slab design bending strength of materials. Apr 4, 2012 this is a typical reinforced concrete cantilever slab reinforcement detail with a constant slab width. Lrfd design examples federal highway administration. Regarding the cantilever slab design i will get on to that later. Design of concrete structures sessional department of civil engineering. Design a cantilever projecting out from a room slab extending 1. Aluminium systems profile selection the purpose of this document is to. Design of cantilever slab spreadsheet download link more from my sitevoided twoway slab design based on aci 31814 spreadsheetdeck toggle navigation. All load combinations were entered into the model, and the combined load effects were compared to the reduced nominal strengths of the members. Purpose of this exercise is to calculate the stresses in a reinforced concrete cantilever beam due to its own weight.
This document is intended to cover the primary design requirements for hollow core floor and. Bibm and ermco are delighted to make these authoritative documents available to design engineers, software developers and all others with an interest. Sci p300 composite slabs and beams using steel decking best. Throughout this document, the term joint is used to refer to a beamcolumn joint. Design maintenance, assessment and repair practical aspects manual. Pdf this article discusses innovative ways of using cantilever structures in modern. Temperature and shrinkage reinforcement is provided along the direction perpendicular to the span. Reinforced concrete design 1 design of slab examples. Design envelopes for cantilever slabs were developed using kingery and bulmashs 1984 empirical method for estimations of blast parameters and the procedures described by.
Introduction concrete slabs on grade are a very common type of concrete construction. Main roads western australia structures engineering design manual page 2 of 6 chapter 01. This appendix presents design examples of the retrofitting techniques for elevation, dry floodproofing, wet. Cantilever slab design bending strength of materials scribd. Reinforced concrete design 1 design of slab examples and. Department of mechanics, materials and structures english. Mar 22, 2017 my telegram channel only for civil engineering study to click this link for joining i have designed of cantilever slab part11 rcc1. The construction and design of concrete slabs on grade d. To make the slab design independent of the type of rail, we will place the wheel load 1 from the nominal face of the rail 1ft from the edge of the slab. Post tension design of slab there is document post tension design of slab available here for reading and downloading.
Reinforced concrete cantilever retaining wall analysis and design aci 31814 reinforced concrete cantilever retaining walls consist of a relatively thin stem and a base slab. Design the cantilever slab of a bus stand shown in figure 4. Refer to page r 2 for the location of the roof area to be designed. Special issues in this type of problem are the treatment of the structure as a composite and the presence of a compressiononly material the concrete. Design of cantilever slab spreadsheet engineering books. Twoway joist concrete slab floor waffle slab system analysis and design design the concrete floor slab system shown below for an intermediate floor with partition weight of 50 psf, and unfactored live load of 100 psf. Maximum pa 500 psi for slabs aci 314 recommendation to avoid excessive shortening shear in both statically determinate and continuous pt members is affected by the shear carried by the tendons.
Asish seeboo, lecturer, university of mauritius, faculty of engineering, dept. Figure 5 for the cantilever length are for large slabs. For the slab it will depend on how the edges are supported which can cause twoway action. Design of toe slab the base width is approximately taken equal to 0. In this post, we are going to show how we can analyse and design cantilever slabs subjected to floor. One way slab design procedure with example design of one. This guide covers the design and construction of composite slabs and beams, and. Even while designing they are considered as oneslabs with cantilever fixed or continuous at supports. Structural design of cantilever slabs solved example. Design step 4 design of deck prestressed concrete bridge design example task order dtfh6102t63032 43 for this example, a slab thickness of 8 in. Slabs are usually used in floor and roof construction. Cantilever slab subjected to a single point load and the resulting moment distribution. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Example composite design design composite concrete slab on steel deck floor for 125 psf live load.
This design should always be used unless approval to use a thinner deck is obtained from the state bridge engineer. Design envelopes for cantilever slabs were developed using kingery and bulmashs 1984 empirical method for estimations of blast parameters and the procedures described by cormie d et al. Usually balcony slabs are cantilever slab and hence a provision for wall load at free end is included so that the spread sheet is useful for practical purposes. Limit state of collapse and limit state of serviceability. Vertical structure concise information on proposal development guides the architect and engineer through all the decisions that have to be made to develop a best practice design overview client guide case studies scheme development flow charts ncci examples. The building is located in seismic zone iii on a site with medium soil. Only the design of slab bridge will be used for illustration. Reinforced concrete design ence 355 introduction to structural design. Pdf cantilever structure in modern construction researchgate. Cantilever slabs are common features in buildings due to the need to have bigger spaces at upper floors.
They may be supported on two opposite sides only fig. A six storey building for a commercial complex has plan dimensions as shown in figure 1. Design of strap or cantilever footings falmatasaba. Design and detailing of reinforced concrete beams and slabs. The projection of toe slab is approximately taken between to 14 of base width. It was thrill walking on it as each step would swing little under weight. Analysis and design of cantilever slab beam structure.
You can design a single span simply supported, fixed or cantilever or many continuous spans. This document was uploaded by user and they confirmed that they have the. The balanced footings and cantilever footings are designed by balancing the loads on the footings through addition of dead loads on the internal column. In particular, see the chapter on postcracking stiffness, p. Appendix a examples colorado department of transportation. Determine suitable dimensions for the effective depth and width of the beam. Analysis and design of slabs one way civil engineers pk. Furthermore, the fact that weathering may lead to the early degradation of material strength should be borne in mind when carrying out the design and construction of cantilevered members exposed to weathering 1. Design of a balanced cantilever bridge cl bridge is symmetric about cl. Pdf design envelopes for cantilever slabs to resist. Bending will take place in the two directions in a dishlike form. Cantilever slab design part1 by parag kamlakar pal.
Design assumptions strap is infinitely rigid strap is a pure flexural member and does not take soil reaction. Ce 479 fall 05compositefloor decks purdue engineering. A 2 2area 2 a c 2 2 posttensioned concrete design table 11 list of symbols used in the aci 31808 code cp area enclosed by the outside perimeter of the section, in a g gross area of concrete, in a 2 l total area of longitudinal reinforcement to resist torsion, in a o area enclosed by the shear flow path, sqin a oh area enclosed by the centerline of the outermost closed. Even while designing they are considered as one slabs with cantilever fixed or continuous at supports. They are projections from wall face of lintel beams or floor slabs. Design and detailing of a cantilever slab is the same as that of a cantilever beam section 3. Shear walls are permitted to be calculated by principles of mechanics without limitations by using values for nail strength given in the nds and wood structural panel design properties given in the apapds. Practice note for authorized persons, registered structural. The toe slab is subjected to an upward soil reaction and is designed as a cantilever slab fixed at the front face of the stem.
Cantilever slab supported on a reinforced concrete beam with top and bottom reinforcement as well as middle torsion reinforcement. The steel deck will be used on 86 3continuous spans. The decking should not cantilever beyond a support more than 600 mm or. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Analysis and design of cantilever slab d47ex7jzmjn2 idocpub. Figure 6 gives a modification coefficient which will adjust the cantilever length for smaller slabs depending on the slab size. In the temporary condition no water will be taken into account. The base is divided into two parts, the heel and toe. Design of reinforced concrete structure one way slab presented by md. Design of slab for flexure 067 m unit width of slab. In case when the fulcrum is near the internal column, the internal footing may be very heavy. Minimum uniformly distributed live loads for building design. The preparation of this document was funded and commissioned by the metal. Students build on their understanding of basic mechanics to learn new concepts such as compressive stress and strain in concrete, while.
Soil conditions the design procedure shown in this report is based on the use of the effective p. Design of slab examples and tutorials by sharifah maszura syed mohsin example 2. The construction and design of concrete slabs on grade. Reinforced concrete design to bs8110 structural design 1. Typical cantilever and suspended span bridge, showing the truss geometry in the end span and cantilevered portion of the main. Design strap as flexural member for the shear and moment obtained above. Verification examples fem design 18 the first part of this equation comes from the bending deformation and the second part comes from the consideration of the shear deformation as well, because fem design is using. It highlights that the unique design of cantilever structures pushes forward the physical. Twoway joist concrete slab floor waffle slab system. Example on design of slab bridge design data and specifications superstructure consists of 10m slab, 36m box girder and 10m tgirder all simply supported. For design purposes on a cantilevered wall, the footing toe is always that.
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